The lack of naturals before the sixth on the 6. quaver is an undoubted oversight by Chopin in A (→FE). The 
before the upper note was complemented in both GE and EE, however the one sharpening d
2 to d2 was only added in GE2 (→GE3→GE4). The lack of the latter accidental also infuences the pitch of the penultimate quaver of the bar. This inaccuracy was noticed during the proofreading of FE (→GE,EE) where a was added before that quaver.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: EE revisions, Accidentals in different octaves, GE revisions
notation: Pitch